Gower, R. (2002). Grammar in practice 2 (First edition.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Gower, Roger. Grammar in Practice 2. First edition. Cambridge: Cambridge University Press, 2002.
Lua MLA (9ú heag.)Gower, Roger. Grammar in Practice 2. First edition. Cambridge University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.